Automatic stop for knitting machines



April 21, 1931. F. w. BEARDSLEY 1,801,841

AUTOMATIC STOP FOR KNITTING MACHINES Filed May 3 1928 2 Sheets-Sheet lGUIDE BARS NEEDLE BARS 2 15- INVENTOR- Frederick W. fieqrdsleg ATTORNEYSApril 21, 1931- F. w. BEARQDSLEY 1,801,841

AUTOMATIC STOP FOR KNITTING MACHINES Filed May 3 192 2 Sheets-Sheet 2 ilW5 I 4 Patented Apr. 21, 1931 I Rearr iOEELlC-E' FREDERICK W..BEARDSLEY, F DRUMMGIIDVILLE, QUEBEC, CANADA, ,AS'SIGNOR TO OELANESECORPORATION OF AMERICA, A CORPORATION OF DELAWARE AUTOMATIC STOP FORKNITTING M ACHINES Application filed tra a, 1928.- Serial no. 274,854.

This invention relates to amechanism for automatically stopping theoperation of a exceeds a predetermined amount.

An object of my. inventionisto provide means for stopping the operationof a knit-' ting machine, and particularly a warp knitting machine, whenthe tension of the yarn 7 mal.

a lever having arms which just clear the ten 10 that is being fedthrough the knitting guides becomes greater than normal, thus preventingthe yarn from breaking.

A further object of my invention is to proany standard warp knittingmachine, without any alteration to the machine, and which, when onceset, does not have to be adjusted every time the machine comes to anormal stop.

In the standard warp knitting machine, the

yarn is fed from the warp beam to' the knitting needles. If, through anycause whatsoever, such as trouble in the automatic gear 1 boX the warpbeam fails to feed the yarn to the knitting bars as fast as is required,or not at all, the knitting needles continue taking up 7 voted at "10.The free-end of the latch 9 normally holds 'the catch 111, which ispivoted at the yarn and knit the same, and as a consequence, the tensionof the yarn increases so much that the yarn breaks over the width of themachine, thereby causing a considerable delay in resetting the knittingmachine.

In accordance with my invention, I provide an automatic stop mechanism,which stops the operation of the knitting machine when the tension ofthe yarn substantially exceeds nor- In one form of my invention Iprovide sion bars in normal operation. .When the tension of the yarnincreases, the tension bars press down on the lever arms, and the levercauses a catch to disengagawhich permits a spring operating mechanism tocause the ma- 'ing of the automatic stop mechanism on the.

frame of the warp knitting machine.

Figure 2 is a cross section along the line knitting machine.

thero'd 16.

-2 2, of Figure 1, showing the stop device wtaken along line, 3+3 ofFigureZ.

The device may be applied to any standard The; ordinary bracket, of themachine for carrying the fabricrollerand operating rod is shown'at 1,inrFigur'e 1. Mountedon the bracketlfis the standardQ,

which'provides a fulcrum forthe operating lever 3. One end ofthe lever 3is provided with the arms 4 which are sosetrthat they are 7justclearofthe tensionrods 5,-.when!the rods vide an adjustment that maybe applied to are at the lowest point: of their normal-motion. The yarnto be knitted passes from the warp beam1(not shown) over the tensionrod5. to the :knitting bars: diagrammatically shown at 6, iand'transmitithe eifect of their 2 tension by tending to depress thetension rods 5 and thereforetheleft side of the lever 3 as shown inFigure 1. V j

, oettached to the :other endof the lever Sis the rod 6, which'isnormally held down by the action of the small tension spring The rod 6is provided with ahorizontal portion 8 at its bottom whichpasses'underlatchj 9 piv- 11, against rotation. When-inlnormal position, thecatch "llprevents the motion ofthe this loop 12, there is placed themember 14 which is fixedly attached to the knitting ma-' chine operatingrod 15, and which slides along the rod 16. One end-ofthe-spring 13 is;fastened to the member 17,:which is attached to =In operation, when theWarp knitting machine is'operating'normally, the yarn passes from thewarp beam over the tension rods 5 to the guide bar 6 However, if for anyrea son whatsoever, the warp 'beam'has stopped supplying yarn totheknitting bars. the

' knitting needles will continue taking up the yarn, and thus produce. atens'iondownward on the tension rods 5. "Usually after about six motionsofneedle bar, the tensionof the yarn becomes so great that the tensionrods 5 cause the left hand side of the lever 3 to be come depressed,thus raising the right hand side of the lever 3, and consequently rod 6,which raises the catch 9. This releases the latch 11 and thereforepermits the loop 12 to move to the left, due to the action of the spring13, and the loop engages the member 14 and causes it, together with theoperating rod 15, to move to the left which automatically stopsoperation of the whole warp knitting machine.

After the trouble that has caused the failure of the proper feeding ofthe yarn to the knitting bar has been remedied, the machine is reset bylifting the tension rods 5 and thus allowing the latch 9 to drop againinto nor mal position, whereupon the-loop 12 may be set again intooperating position.

It will be seen that the construction of this device is very simple andthat itcan be easily applied to any warp knitting machine at very slightcost.

It is to be understood that the foregoing detailed description is givenmerely by way of illustration, and that many variations may be madetherein without departing from the spirit of the invention.

Having described my invention, what I claim and desire to secure byLetters Patent is:

1. In a warp knitting machine for knitting yarns, the combination with awarp beam, the tension rods over which all of the yarns of the warpspass, and the needle bars, of means operated by the tension rods forautomatically stopping the operation of the knitting machine when theyarns of the warps as a whole exert a predetermined tension on thetension rods.

2. In a warp knitting machine for knitting yarns, the combination withthe war beam, the tension rods over which all of the the yarns of thewarps pass, and the needle bars, of means for stopping the operation ofthe knitting machine, a lever mounted on the frame of the knittingmachine, one end of such lever being operated by the tension rods whenthe yarns of the warps as a whole exert a predetermined tension thereonand a connection between the other end of the lever and the means forspopping the operation of the knitting mac nne.

In a warp knitting machine for kniti ting yarns, the combination withthe warp venting the movement of the operating rod.

l. In a warp knitting machine having tension rods over which all theyarns of the warps pass, needle bars and an operating rod, thecombination of a loop, means atached to the operating 1)(l and engagedby said loop, means tending to move the loop in a direction to cause theoperating rod to stop the operation of the knitting machine, a latchtending to prevent the movement of the loop, a lever operated by thetension rods and having a connection with said latch, whereby when apredetermined tension is exerted by the yarns of the warps as a whole onthe tension rods, the latch is disengaged, thus permitting the operatingrod to be moved and cause the operation of the knitting machine tocease.

In testimony whereof, I have hereunto subscribed my name.

FREDERICK W. BEARDSLEY.

